import { FocusMonitor, FocusTrapFactory } from '@angular/cdk/a11y';
import { Directionality } from '@angular/cdk/bidi';
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { ESCAPE, hasModifierKey } from '@angular/cdk/keycodes';
import { Platform } from '@angular/cdk/platform';
import { CdkScrollable, ScrollDispatcher, ViewportRuler } from '@angular/cdk/scrolling';
import { DOCUMENT } from '@angular/common';
import { ChangeDetectionStrategy, ChangeDetectorRef, Component, ContentChild, ContentChildren, ElementRef, EventEmitter, forwardRef, Inject, InjectionToken, Input, NgZone, Optional, Output, QueryList, ViewChild, ViewEncapsulation, HostListener, HostBinding, } from '@angular/core';
import { fromEvent, merge, Observable, Subject } from 'rxjs';
import { debounceTime, filter, map, startWith, take, takeUntil, distinctUntilChanged, mapTo, } from 'rxjs/operators';
import { rDrawerAnimations } from './drawer-animations';
import { ANIMATION_MODULE_TYPE } from '@angular/platform-browser/animations';
/**
 * Throws an exception when two RDrawer are matching the same position.
 * @docs-private
 */
export function throwRDuplicatedDrawerError(position) {
    throw Error(`A drawer was already declared for 'position="${position}"'`);
}
/** Configures whether drawers should use auto sizing by default. */
export const R_DRAWER_DEFAULT_AUTOSIZE = new InjectionToken('R_DRAWER_DEFAULT_AUTOSIZE', {
    providedIn: 'root',
    factory: R_DRAWER_DEFAULT_AUTOSIZE_FACTORY,
});
/**
 * Used to provide a drawer container to a drawer while avoiding circular references.
 * @docs-private
 */
export const R_DRAWER_CONTAINER = new InjectionToken('R_DRAWER_CONTAINER');
/** @docs-private */
export function R_DRAWER_DEFAULT_AUTOSIZE_FACTORY() {
    return false;
}
export class RDrawerContent extends CdkScrollable {
    constructor(_changeDetectorRef, _container, elementRef, scrollDispatcher, ngZone) {
        super(elementRef, scrollDispatcher, ngZone);
        this._changeDetectorRef = _changeDetectorRef;
        this._container = _container;
    }
    ngAfterContentInit() {
        this._container._contentMarginChanges.subscribe(() => {
            this._changeDetectorRef.markForCheck();
        });
    }
}
RDrawerContent.decorators = [
    { type: Component, args: [{
                selector: 'r-drawer-content',
                template: '<ng-content></ng-content>',
                host: {
                    'class': 'r-drawer-content',
                    '[style.margin-left.px]': '_container._contentMargins.left',
                    '[style.margin-right.px]': '_container._contentMargins.right',
                },
                changeDetection: ChangeDetectionStrategy.OnPush,
                encapsulation: ViewEncapsulation.None
            },] }
];
RDrawerContent.ctorParameters = () => [
    { type: ChangeDetectorRef },
    { type: RDrawerContainer, decorators: [{ type: Inject, args: [forwardRef(() => RDrawerContainer),] }] },
    { type: ElementRef },
    { type: ScrollDispatcher },
    { type: NgZone }
];
/**
 * This component corresponds to a drawer that can be opened on the drawer container.
 */
export class RDrawer {
    constructor(_elementRef, _focusTrapFactory, _focusMonitor, _platform, _ngZone, _doc, _container) {
        this._elementRef = _elementRef;
        this._focusTrapFactory = _focusTrapFactory;
        this._focusMonitor = _focusMonitor;
        this._platform = _platform;
        this._ngZone = _ngZone;
        this._doc = _doc;
        this._container = _container;
        this._elementFocusedBeforeDrawerWasOpened = null;
        /** Whether the drawer is initialized. Used for disabling the initial animation. */
        this._enableAnimations = false;
        this._position = 'start';
        this._mode = 'over';
        this._disableClose = false;
        this._opened = false;
        /** Emits whenever the drawer has started animating. */
        this._animationStarted = new Subject();
        /** Emits whenever the drawer is done animating. */
        this._animationEnd = new Subject();
        /** Current state of the sidenav animation. */
        // @HostBinding is used in the class as it is expected to be extended.  Since @Component decorator
        // metadata is not inherited by child classes, instead the host binding data is defined in a way
        // that can be inherited.
        // tslint:disable:no-host-decorator-in-concrete
        this._animationState = 'void';
        /** Event emitted when the drawer open state is changed. */
        this.openedChange = 
        // Note this has to be async in order to avoid some issues with two-bindings (see #8872).
        new EventEmitter(/* isAsync */ true);
        /** Event emitted when the drawer has been opened. */
        this._openedStream = this.openedChange.pipe(filter(o => o), map(() => { }));
        /** Event emitted when the drawer has started opening. */
        this.openedStart = this._animationStarted.pipe(filter(e => e.fromState !== e.toState && e.toState.indexOf('open') === 0), mapTo(undefined));
        /** Event emitted when the drawer has been closed. */
        this._closedStream = this.openedChange.pipe(filter(o => !o), map(() => { }));
        /** Event emitted when the drawer has started closing. */
        this.closedStart = this._animationStarted.pipe(filter(e => e.fromState !== e.toState && e.toState === 'void'), mapTo(undefined));
        /** Emits when the component is destroyed. */
        this._destroyed = new Subject();
        /** Event emitted when the drawer's position changes. */
        this.onPositionChanged = new EventEmitter();
        /**
         * An observable that emits when the drawer mode changes. This is used by the drawer container to
         * to know when to when the mode changes so it can adapt the margins on the content.
         */
        this._modeChanged = new Subject();
        this.openedChange.subscribe((opened) => {
            if (opened) {
                if (this._doc) {
                    this._elementFocusedBeforeDrawerWasOpened = this._doc.activeElement;
                }
                this._takeFocus();
            }
            else if (this._isFocusWithinDrawer()) {
                this._restoreFocus();
            }
        });
        /**
         * Listen to `keydown` events outside the zone so that change detection is not run every
         * time a key is pressed. Instead we re-enter the zone only if the `ESC` key is pressed
         * and we don't have close disabled.
         */
        this._ngZone.runOutsideAngular(() => {
            fromEvent(this._elementRef.nativeElement, 'keydown').pipe(filter(event => {
                return event.keyCode === ESCAPE && !this.disableClose && !hasModifierKey(event);
            }), takeUntil(this._destroyed)).subscribe(event => this._ngZone.run(() => {
                this.close();
                event.stopPropagation();
                event.preventDefault();
            }));
        });
        // We need a Subject with distinctUntilChanged, because the `done` event
        // fires twice on some browsers. See https://github.com/angular/angular/issues/24084
        this._animationEnd.pipe(distinctUntilChanged((x, y) => {
            return x.fromState === y.fromState && x.toState === y.toState;
        })).subscribe((event) => {
            const { fromState, toState } = event;
            if ((toState.indexOf('open') === 0 && fromState === 'void') ||
                (toState === 'void' && fromState.indexOf('open') === 0)) {
                this.openedChange.emit(this._opened);
            }
        });
    }
    /** The side that the drawer is attached to. */
    get position() { return this._position; }
    set position(value) {
        // Make sure we have a valid value.
        value = value === 'end' ? 'end' : 'start';
        if (value != this._position) {
            this._position = value;
            this.onPositionChanged.emit();
        }
    }
    /** Mode of the drawer; one of 'over', 'push' or 'side'. */
    get mode() { return this._mode; }
    set mode(value) {
        this._mode = value;
        this._updateFocusTrapState();
        this._modeChanged.next();
    }
    /** Whether the drawer can be closed with the escape key or by clicking on the backdrop. */
    get disableClose() { return this._disableClose; }
    set disableClose(value) { this._disableClose = coerceBooleanProperty(value); }
    /**
     * Whether the drawer should focus the first focusable element automatically when opened.
     * Defaults to false in when `mode` is set to `side`, otherwise defaults to `true`. If explicitly
     * enabled, focus will be moved into the sidenav in `side` mode as well.
     */
    get autoFocus() {
        const value = this._autoFocus;
        // Note that usually we disable auto focusing in `side` mode, because we don't know how the
        // sidenav is being used, but in some cases it still makes sense to do it. If the consumer
        // explicitly enabled `autoFocus`, we take it as them always wanting to enable it.
        return value == null ? this.mode !== 'side' : value;
    }
    set autoFocus(value) { this._autoFocus = coerceBooleanProperty(value); }
    /**
     * Whether the drawer is opened. We overload this because we trigger an event when it
     * starts or end.
     */
    get opened() { return this._opened; }
    set opened(value) { this.toggle(coerceBooleanProperty(value)); }
    /**
     * Moves focus into the drawer. Note that this works even if
     * the focus trap is disabled in `side` mode.
     */
    _takeFocus() {
        if (!this.autoFocus || !this._focusTrap) {
            return;
        }
        this._focusTrap.focusInitialElementWhenReady().then(hasMovedFocus => {
            // If there were no focusable elements, focus the sidenav itself so the keyboard navigation
            // still works. We need to check that `focus` is a function due to Universal.
            if (!hasMovedFocus && typeof this._elementRef.nativeElement.focus === 'function') {
                this._elementRef.nativeElement.focus();
            }
        });
    }
    /**
     * Restores focus to the element that was originally focused when the drawer opened.
     * If no element was focused at that time, the focus will be restored to the drawer.
     */
    _restoreFocus() {
        if (!this.autoFocus) {
            return;
        }
        // Note that we don't check via `instanceof HTMLElement` so that we can cover SVGs as well.
        if (this._elementFocusedBeforeDrawerWasOpened) {
            this._focusMonitor.focusVia(this._elementFocusedBeforeDrawerWasOpened, this._openedVia);
        }
        else {
            this._elementRef.nativeElement.blur();
        }
        this._elementFocusedBeforeDrawerWasOpened = null;
        this._openedVia = null;
    }
    /** Whether focus is currently within the drawer. */
    _isFocusWithinDrawer() {
        var _a;
        const activeEl = (_a = this._doc) === null || _a === void 0 ? void 0 : _a.activeElement;
        return !!activeEl && this._elementRef.nativeElement.contains(activeEl);
    }
    ngAfterContentInit() {
        this._focusTrap = this._focusTrapFactory.create(this._elementRef.nativeElement);
        this._updateFocusTrapState();
    }
    ngAfterContentChecked() {
        // Enable the animations after the lifecycle hooks have run, in order to avoid animating
        // drawers that are open by default. When we're on the server, we shouldn't enable the
        // animations, because we don't want the drawer to animate the first time the user sees
        // the page.
        if (this._platform.isBrowser) {
            this._enableAnimations = true;
        }
    }
    ngOnDestroy() {
        if (this._focusTrap) {
            this._focusTrap.destroy();
        }
        this._animationStarted.complete();
        this._animationEnd.complete();
        this._modeChanged.complete();
        this._destroyed.next();
        this._destroyed.complete();
    }
    /**
     * Open the drawer.
     * @param openedVia Whether the drawer was opened by a key press, mouse click or programmatically.
     * Used for focus management after the sidenav is closed.
     */
    open(openedVia) {
        return this.toggle(true, openedVia);
    }
    /** Close the drawer. */
    close() {
        return this.toggle(false);
    }
    /** Closes the drawer with context that the backdrop was clicked. */
    _closeViaBackdropClick() {
        // If the drawer is closed upon a backdrop click, we always want to restore focus. We
        // don't need to check whether focus is currently in the drawer, as clicking on the
        // backdrop causes blurring of the active element.
        return this._setOpen(/* isOpen */ false, /* restoreFocus */ true);
    }
    /**
     * Toggle this drawer.
     * @param isOpen Whether the drawer should be open.
     * @param openedVia Whether the drawer was opened by a key press, mouse click or programmatically.
     * Used for focus management after the sidenav is closed.
     */
    toggle(isOpen = !this.opened, openedVia) {
        // If the focus is currently inside the drawer content and we are closing the drawer,
        // restore the focus to the initially focused element (when the drawer opened).
        return this._setOpen(isOpen, /* restoreFocus */ !isOpen && this._isFocusWithinDrawer(), openedVia);
    }
    /**
     * Toggles the opened state of the drawer.
     * @param isOpen Whether the drawer should open or close.
     * @param restoreFocus Whether focus should be restored on close.
     * @param openedVia Focus origin that can be optionally set when opening a drawer. The
     *   origin will be used later when focus is restored on drawer close.
     */
    _setOpen(isOpen, restoreFocus, openedVia = 'program') {
        this._opened = isOpen;
        if (isOpen) {
            this._animationState = this._enableAnimations ? 'open' : 'open-instant';
            this._openedVia = openedVia;
        }
        else {
            this._animationState = 'void';
            if (restoreFocus) {
                this._restoreFocus();
            }
        }
        this._updateFocusTrapState();
        return new Promise(resolve => {
            this.openedChange.pipe(take(1)).subscribe(open => resolve(open ? 'open' : 'close'));
        });
    }
    _getWidth() {
        return this._elementRef.nativeElement ? (this._elementRef.nativeElement.offsetWidth || 0) : 0;
    }
    /** Updates the enabled state of the focus trap. */
    _updateFocusTrapState() {
        if (this._focusTrap) {
            // The focus trap is only enabled when the drawer is open in any mode other than side.
            this._focusTrap.enabled = this.opened && this.mode !== 'side';
        }
    }
    // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.
    // In Ivy the `host` bindings will be merged when this class is extended, whereas in
    // ViewEngine they're overwritten.
    // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.
    // tslint:disable-next-line:no-host-decorator-in-concrete
    _animationStartListener(event) {
        this._animationStarted.next(event);
    }
    // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.
    // In Ivy the `host` bindings will be merged when this class is extended, whereas in
    // ViewEngine they're overwritten.
    // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.
    // tslint:disable-next-line:no-host-decorator-in-concrete
    _animationDoneListener(event) {
        this._animationEnd.next(event);
    }
}
RDrawer.decorators = [
    { type: Component, args: [{
                selector: 'r-drawer',
                exportAs: 'matDrawer',
                template: "<div class=\"r-drawer-inner-container\">\r\n  <ng-content></ng-content>\r\n</div>\r\n",
                animations: [rDrawerAnimations.transformDrawer],
                host: {
                    'class': 'r-drawer',
                    // must prevent the browser from aligning text based on value
                    '[attr.align]': 'null',
                    '[class.r-drawer-end]': 'position === "end"',
                    '[class.r-drawer-over]': 'mode === "over"',
                    '[class.r-drawer-push]': 'mode === "push"',
                    '[class.r-drawer-side]': 'mode === "side"',
                    '[class.r-drawer-opened]': 'opened',
                    'tabIndex': '-1',
                },
                changeDetection: ChangeDetectionStrategy.OnPush,
                encapsulation: ViewEncapsulation.None
            },] }
];
RDrawer.ctorParameters = () => [
    { type: ElementRef },
    { type: FocusTrapFactory },
    { type: FocusMonitor },
    { type: Platform },
    { type: NgZone },
    { type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [DOCUMENT,] }] },
    { type: RDrawerContainer, decorators: [{ type: Optional }, { type: Inject, args: [R_DRAWER_CONTAINER,] }] }
];
RDrawer.propDecorators = {
    position: [{ type: Input }],
    mode: [{ type: Input }],
    disableClose: [{ type: Input }],
    autoFocus: [{ type: Input }],
    opened: [{ type: Input }],
    _animationState: [{ type: HostBinding, args: ['@transform',] }],
    openedChange: [{ type: Output }],
    _openedStream: [{ type: Output, args: ['opened',] }],
    openedStart: [{ type: Output }],
    _closedStream: [{ type: Output, args: ['closed',] }],
    closedStart: [{ type: Output }],
    onPositionChanged: [{ type: Output, args: ['positionChanged',] }],
    _animationStartListener: [{ type: HostListener, args: ['@transform.start', ['$event'],] }],
    _animationDoneListener: [{ type: HostListener, args: ['@transform.done', ['$event'],] }]
};
/**
 * `<r-drawer-container>` component.
 *
 * This is the parent component to one or two `<r-drawer>`s that validates the state internally
 * and coordinates the backdrop and content styling.
 */
export class RDrawerContainer {
    constructor(_dir, _element, _ngZone, _changeDetectorRef, viewportRuler, defaultAutosize = false, _animationMode) {
        this._dir = _dir;
        this._element = _element;
        this._ngZone = _ngZone;
        this._changeDetectorRef = _changeDetectorRef;
        this._animationMode = _animationMode;
        /** Drawers that belong to this container. */
        this._drawers = new QueryList();
        /** Event emitted when the drawer backdrop is clicked. */
        this.backdropClick = new EventEmitter();
        /** Emits when the component is destroyed. */
        this._destroyed = new Subject();
        /** Emits on every ngDoCheck. Used for debouncing reflows. */
        this._doCheckSubject = new Subject();
        /**
         * Margins to be applied to the content. These are used to push / shrink the drawer content when a
         * drawer is open. We use margin rather than transform even for push mode because transform breaks
         * fixed position elements inside of the transformed element.
         */
        this._contentMargins = { left: null, right: null };
        this._contentMarginChanges = new Subject();
        // If a `Dir` directive exists up the tree, listen direction changes
        // and update the left/right properties to point to the proper start/end.
        if (_dir) {
            _dir.change.pipe(takeUntil(this._destroyed)).subscribe(() => {
                this._validateDrawers();
                this.updateContentMargins();
            });
        }
        // Since the minimum width of the sidenav depends on the viewport width,
        // we need to recompute the margins if the viewport changes.
        viewportRuler.change()
            .pipe(takeUntil(this._destroyed))
            .subscribe(() => this.updateContentMargins());
        this._autosize = defaultAutosize;
    }
    /** The drawer child with the `start` position. */
    get start() { return this._start; }
    /** The drawer child with the `end` position. */
    get end() { return this._end; }
    /**
     * Whether to automatically resize the container whenever
     * the size of any of its drawers changes.
     *
     * **Use at your own risk!** Enabling this option can cause layout thrashing by measuring
     * the drawers on every change detection cycle. Can be configured globally via the
     * `R_DRAWER_DEFAULT_AUTOSIZE` token.
     */
    get autosize() { return this._autosize; }
    set autosize(value) { this._autosize = coerceBooleanProperty(value); }
    /**
     * Whether the drawer container should have a backdrop while one of the sidenavs is open.
     * If explicitly set to `true`, the backdrop will be enabled for drawers in the `side`
     * mode as well.
     */
    get hasBackdrop() {
        if (this._backdropOverride == null) {
            return !this._start || this._start.mode !== 'side' || !this._end || this._end.mode !== 'side';
        }
        return this._backdropOverride;
    }
    set hasBackdrop(value) {
        this._backdropOverride = value == null ? null : coerceBooleanProperty(value);
    }
    /** Reference to the CdkScrollable instance that wraps the scrollable content. */
    get scrollable() {
        return this._userContent || this._content;
    }
    ngAfterContentInit() {
        this._allDrawers.changes
            .pipe(startWith(this._allDrawers), takeUntil(this._destroyed))
            .subscribe((drawer) => {
            this._drawers.reset(drawer.filter(item => !item._container || item._container === this));
            this._drawers.notifyOnChanges();
        });
        this._drawers.changes.pipe(startWith(null)).subscribe(() => {
            this._validateDrawers();
            this._drawers.forEach((drawer) => {
                this._watchDrawerToggle(drawer);
                this._watchDrawerPosition(drawer);
                this._watchDrawerMode(drawer);
            });
            if (!this._drawers.length ||
                this._isDrawerOpen(this._start) ||
                this._isDrawerOpen(this._end)) {
                this.updateContentMargins();
            }
            this._changeDetectorRef.markForCheck();
        });
        // Avoid hitting the NgZone through the debounce timeout.
        this._ngZone.runOutsideAngular(() => {
            this._doCheckSubject.pipe(debounceTime(10), // Arbitrary debounce time, less than a frame at 60fps
            takeUntil(this._destroyed)).subscribe(() => this.updateContentMargins());
        });
    }
    ngOnDestroy() {
        this._contentMarginChanges.complete();
        this._doCheckSubject.complete();
        this._drawers.destroy();
        this._destroyed.next();
        this._destroyed.complete();
    }
    /** Calls `open` of both start and end drawers */
    open() {
        this._drawers.forEach(drawer => drawer.open());
    }
    /** Calls `close` of both start and end drawers */
    close() {
        this._drawers.forEach(drawer => drawer.close());
    }
    /**
     * Recalculates and updates the inline styles for the content. Note that this should be used
     * sparingly, because it causes a reflow.
     */
    updateContentMargins() {
        // 1. For drawers in `over` mode, they don't affect the content.
        // 2. For drawers in `side` mode they should shrink the content. We do this by adding to the
        //    left margin (for left drawer) or right margin (for right the drawer).
        // 3. For drawers in `push` mode the should shift the content without resizing it. We do this by
        //    adding to the left or right margin and simultaneously subtracting the same amount of
        //    margin from the other side.
        let left = 0;
        let right = 0;
        if (this._left && this._left.opened) {
            if (this._left.mode == 'side') {
                left += this._left._getWidth();
            }
            else if (this._left.mode == 'push') {
                const width = this._left._getWidth();
                left += width;
                right -= width;
            }
        }
        if (this._right && this._right.opened) {
            if (this._right.mode == 'side') {
                right += this._right._getWidth();
            }
            else if (this._right.mode == 'push') {
                const width = this._right._getWidth();
                right += width;
                left -= width;
            }
        }
        // If either `right` or `left` is zero, don't set a style to the element. This
        // allows users to specify a custom size via CSS class in SSR scenarios where the
        // measured widths will always be zero. Note that we reset to `null` here, rather
        // than below, in order to ensure that the types in the `if` below are consistent.
        left = left || null;
        right = right || null;
        if (left !== this._contentMargins.left || right !== this._contentMargins.right) {
            this._contentMargins = { left, right };
            // Pull back into the NgZone since in some cases we could be outside. We need to be careful
            // to do it only when something changed, otherwise we can end up hitting the zone too often.
            this._ngZone.run(() => this._contentMarginChanges.next(this._contentMargins));
        }
    }
    ngDoCheck() {
        // If users opted into autosizing, do a check every change detection cycle.
        if (this._autosize && this._isPushed()) {
            // Run outside the NgZone, otherwise the debouncer will throw us into an infinite loop.
            this._ngZone.runOutsideAngular(() => this._doCheckSubject.next());
        }
    }
    /**
     * Subscribes to drawer events in order to set a class on the main container element when the
     * drawer is open and the backdrop is visible. This ensures any overflow on the container element
     * is properly hidden.
     */
    _watchDrawerToggle(drawer) {
        drawer._animationStarted.pipe(filter((event) => event.fromState !== event.toState), takeUntil(this._drawers.changes))
            .subscribe((event) => {
            // Set the transition class on the container so that the animations occur. This should not
            // be set initially because animations should only be triggered via a change in state.
            if (event.toState !== 'open-instant' && this._animationMode !== 'NoopAnimations') {
                this._element.nativeElement.classList.add('r-drawer-transition');
            }
            this.updateContentMargins();
            this._changeDetectorRef.markForCheck();
        });
        if (drawer.mode !== 'side') {
            drawer.openedChange.pipe(takeUntil(this._drawers.changes)).subscribe(() => this._setContainerClass(drawer.opened));
        }
    }
    /**
     * Subscribes to drawer onPositionChanged event in order to
     * re-validate drawers when the position changes.
     */
    _watchDrawerPosition(drawer) {
        if (!drawer) {
            return;
        }
        // NOTE: We need to wait for the microtask queue to be empty before validating,
        // since both drawers may be swapping positions at the same time.
        drawer.onPositionChanged.pipe(takeUntil(this._drawers.changes)).subscribe(() => {
            this._ngZone.onMicrotaskEmpty.pipe(take(1)).subscribe(() => {
                this._validateDrawers();
            });
        });
    }
    /** Subscribes to changes in drawer mode so we can run change detection. */
    _watchDrawerMode(drawer) {
        if (drawer) {
            drawer._modeChanged.pipe(takeUntil(merge(this._drawers.changes, this._destroyed)))
                .subscribe(() => {
                this.updateContentMargins();
                this._changeDetectorRef.markForCheck();
            });
        }
    }
    /** Toggles the 'r-drawer-opened' class on the main 'r-drawer-container' element. */
    _setContainerClass(isAdd) {
        const classList = this._element.nativeElement.classList;
        const className = 'r-drawer-container-has-open';
        if (isAdd) {
            classList.add(className);
        }
        else {
            classList.remove(className);
        }
    }
    /** Validate the state of the drawer children components. */
    _validateDrawers() {
        this._start = this._end = null;
        // Ensure that we have at most one start and one end drawer.
        this._drawers.forEach(drawer => {
            if (drawer.position == 'end') {
                this._end = drawer;
            }
            else {
                this._start = drawer;
            }
        });
        this._right = this._left = null;
        // Detect if we're LTR or RTL.
        if (this._dir && this._dir.value === 'rtl') {
            this._left = this._end;
            this._right = this._start;
        }
        else {
            this._left = this._start;
            this._right = this._end;
        }
    }
    /** Whether the container is being pushed to the side by one of the drawers. */
    _isPushed() {
        return (this._isDrawerOpen(this._start) && this._start.mode != 'over') ||
            (this._isDrawerOpen(this._end) && this._end.mode != 'over');
    }
    _onBackdropClicked() {
        this.backdropClick.emit();
        this._closeModalDrawersViaBackdrop();
    }
    _closeModalDrawersViaBackdrop() {
        // Close all open drawers where closing is not disabled and the mode is not `side`.
        [this._start, this._end]
            .filter(drawer => drawer && !drawer.disableClose && this._canHaveBackdrop(drawer))
            .forEach(drawer => drawer._closeViaBackdropClick());
    }
    _isShowingBackdrop() {
        return (this._isDrawerOpen(this._start) && this._canHaveBackdrop(this._start)) ||
            (this._isDrawerOpen(this._end) && this._canHaveBackdrop(this._end));
    }
    _canHaveBackdrop(drawer) {
        return drawer.mode !== 'side' || !!this._backdropOverride;
    }
    _isDrawerOpen(drawer) {
        return drawer != null && drawer.opened;
    }
}
RDrawerContainer.decorators = [
    { type: Component, args: [{
                selector: 'r-drawer-container',
                exportAs: 'matDrawerContainer',
                template: "<div class=\"r-drawer-backdrop\" (click)=\"_onBackdropClicked()\" *ngIf=\"hasBackdrop\"\r\n     [class.r-drawer-shown]=\"_isShowingBackdrop()\"></div>\r\n\r\n<ng-content select=\"r-drawer\"></ng-content>\r\n\r\n<ng-content select=\"r-drawer-content\">\r\n</ng-content>\r\n<r-drawer-content *ngIf=\"!_content\">\r\n  <ng-content></ng-content>\r\n</r-drawer-content>\r\n",
                host: {
                    'class': 'r-drawer-container',
                    '[class.r-drawer-container-explicit-backdrop]': '_backdropOverride',
                },
                changeDetection: ChangeDetectionStrategy.OnPush,
                encapsulation: ViewEncapsulation.None,
                providers: [{
                        provide: R_DRAWER_CONTAINER,
                        useExisting: RDrawerContainer
                    }],
                styles: [".r-drawer-container{position:relative;z-index:1;box-sizing:border-box;-webkit-overflow-scrolling:touch;display:block;overflow:hidden}.r-drawer-container[fullscreen].r-drawer-container-has-open{overflow:hidden}.r-drawer-container.r-drawer-container-explicit-backdrop .r-drawer-side{z-index:3}.ng-animate-disabled .r-drawer-container .r-drawer-backdrop,.ng-animate-disabled .r-drawer-container .r-drawer-content,.r-drawer-container.ng-animate-disabled .r-drawer-backdrop,.r-drawer-container.ng-animate-disabled .r-drawer-content{transition:none}.r-drawer-backdrop{top:0;left:0;right:0;bottom:0;position:absolute;display:block;z-index:3;visibility:hidden}.r-drawer-backdrop.r-drawer-shown{visibility:visible}.r-drawer-transition .r-drawer-backdrop{transition-duration:.4s;transition-timing-function:cubic-bezier(.55,0,.55,.2);transition-property:background-color,visibility}.r-drawer-content{position:relative;z-index:1;display:block;height:100%;overflow:auto}.r-drawer-transition .r-drawer-content{transition-duration:.4s;transition-timing-function:cubic-bezier(.25,.8,.25,1);transition-property:transform,margin-left,margin-right}.r-drawer{position:relative;z-index:4;display:block;position:absolute;top:0;bottom:0;z-index:3;outline:0;box-sizing:border-box;overflow-y:auto;transform:translate3d(-100%,0,0)}.r-drawer.r-drawer-side{z-index:2}.r-drawer.r-drawer-end{right:0}.r-drawer.r-drawer-end,[dir=rtl] .r-drawer{transform:translate3d(100%,0,0)}[dir=rtl] .r-drawer.r-drawer-end{left:0;right:auto;transform:translate3d(-100%,0,0)}.r-drawer-inner-container{width:100%;height:100%;overflow:auto;-webkit-overflow-scrolling:touch}.r-sidenav-fixed{position:fixed}"]
            },] }
];
RDrawerContainer.ctorParameters = () => [
    { type: Directionality, decorators: [{ type: Optional }] },
    { type: ElementRef },
    { type: NgZone },
    { type: ChangeDetectorRef },
    { type: ViewportRuler },
    { type: undefined, decorators: [{ type: Inject, args: [R_DRAWER_DEFAULT_AUTOSIZE,] }] },
    { type: String, decorators: [{ type: Optional }, { type: Inject, args: [ANIMATION_MODULE_TYPE,] }] }
];
RDrawerContainer.propDecorators = {
    _allDrawers: [{ type: ContentChildren, args: [RDrawer, {
                    // We need to use `descendants: true`, because Ivy will no longer match
                    // indirect descendants if it's left as false.
                    descendants: true
                },] }],
    _content: [{ type: ContentChild, args: [RDrawerContent,] }],
    _userContent: [{ type: ViewChild, args: [RDrawerContent,] }],
    autosize: [{ type: Input }],
    hasBackdrop: [{ type: Input }],
    backdropClick: [{ type: Output }]
};
//# sourceMappingURL=drawer.js.map